Bridge-wall for furnaces.



G. WAREINGTON & L. D. LOVEKIN.

BRIDGE WALL FOR FURNACES.

APPLICATION FILED JUNE 11. 1908. RENEWED SEPT. 21, 1909.

Patented Dec. 28, 1909.

2 SHEETS-SHEET 1v G. WARRINGTON & L. D. LOVEKIN.

BRIDGE WALL FOR FURNACES.

APPLICATION FILED JUNE 11, 1908. RENEWED SEPT. 21, 1909.

944,753, Patented Dec. 28, 1909.

2 SHEBTSSHEET 2.

11 dun UNITEDSTATES PATENT OFFICE.

GEORGE WARRINGrTON,v OF WASHINGTON, DISTRICT OF COLUMBIA, AND LUTHER D.

LOVEKIN, OE PHILADELPHIA, PENNSYLVANIA; SAID GEORGE WARRINGTOII AS-SIGNOR T0 JAMES N. WARRINGTON, 0F HONOLULU, TERRITORY OF HAWAII.

BRIDGE-WALL FOR FURNACES.

Application filed June 11, 1908, Serial No. 437,874.

To all whom it may concern:

TON, a citizen of the United States, residing at \Vashington, Districtof Columbia, and LUTHER D. LOVEKIN, a citizen of the United States,residing at Overbrook, Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain inw and useful Improvementsin Bridge-Vans for Furnaces, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to bridge walls for boiler furnaces and the like,and one of the primaryobjects thereof is to provide anellicientconstruction for admitting air in a heated state to thefire-box of the furnace so that a substantially complete and perfectcombustion will be obtained of all the combustible constituents of thematerial employed for the fuel, thereby securing great economy in theuse of fuel with high efficiency, avoiding the escape of smoke, andpreventing the passage of cinders through the boiler-tubes.

A further object of the invention is the provision of a bridge wallstructure forthe purpose specified which is constructed of a pluralityof bridge bars, any one of which being capable of easy removal from itssupport when desired.

Another object is to provide said bridge bars with heat abstracting ribsor fins which when the bars are assembled upon their support within thefurnace, present a corrugated bed or surface to the fuel and thusprevents any clinker adhering to the bridge bars.

A still further object of the invention is to construct the bridge barswith a narrow slot across the top of each bar so that when the bars areassembled the bridge wall will be provided with a continuous slot thewhole length of said bridge wall, whereby a sheet of air may bedelivered into the fire-box through the top of the bridge wall.

The objects of the invention will appear and the many advantages thereofbe appreciated as the same is morefully described.

To effect the ends sought, the invei'ition includes the combination andarrangement of component parts and the details of construction to behereinafter described, and particularly pointed out in the claims.

Specification of Letters Patent.

Patented Dec. 28, 1909.

Renewed September 21, 1909. Serial No. 518,800.}.

I In the accompanying drawings z-Figure Be it known that we, GnononWamuxo- 1 is a partial longitudinal section through a boiler furnace,illustrating the bridge wall in proper position. Fig. 2 is a crosssectional view of the support for the bridge bars and the locking meanstherefor, one of said bridge bars being shown in position to be liftedand removed from the support. Fig. 3 is a front elevation of the bridgewall and its support. Fig. t is a plan view of the same. Fig. 5 -is asimilar view to that of Fig. 2, illustrating the bridge bar in lockedposition, and, Fig. 6 is a cross sectional view of one of the bridgebars, taken on the line of Fig. 5, and illustrating clearly the shape ofthe rib or fin.

Referring to the drawings, 1 denotes a fragmentary part of a boilerfurnace, and 2 the supporting plate for the bridge wall bars, saidsupporting plate being suitably secured to the interior of the furnacestructure, and adjacent the furnace grate, by means of the angle iron 3to which it is bolted, cement being used as indicated at 4 for thepurpose of making an air tight joint between the supporting plate andthe furnace structure. Extending from the plate and at a right anglethereto, is a supporting shelf 5 upon which the lower ends of the bridgebars are adapted to rest, said supporting shelf being preferably madeinte gral with the plate 2. This shelf also serves as a support for thegrate bars 6 of the furnace grate, said grate bars resting upon abeveled surface as indicated at 7 The bridge bars are indicated at 8,and the same are formed preferably of a shape substantially as shown inthe drawings, it being an important feature of the invention to makesaid bars of considerable depth so as to enable the same to store upheat for the purpose of thoroughly heating the air admitted between thebridge bars from the ash pit. Furthermore the bridge bars are formedwith recesses or notches 9 upon 0pposite sides thereof so that when thebars are assembled the bridge Wall shall have the requisite area ofdraft openings. It is also .to be-noted that the bridge bars are provided with a hooked upper end 10 which enables the bars to be supportedor hung from the upper end of the plate 2, said bars resting at theirlower ends upon the shelf 5 as heretofore explained. .7

' fact that a lug or projection 13 is formed on the bridge bar adjacentthe hooked end thereof and adapted to engage the under side of aprojecting ledge 14 upon the upper end of the supporting plate 2, itwill be readily understood that it will be impossible to remove any oneof the bars from its support when the lock-bar is in locked position.

To remove any one of the bars from its support, (and it is to beunderstood at this point that this may be accomplished withoutdisturbing the other bridge bars), it is only necessary to unscrew thenuts on the bolts 12 and allow the lock-bar to drop into the positionsubstantially shown in Fig. 2, which will permit the bridge bar to bemoved into a position as shown in said Fig. 2, and thus allow theprojection 13 to clear the ledge 14 on the plate 2 when the bridge baris lifted from its support. It will be readily understood that thelock-bar 11 is used for locking all of the bridge bars to their support,and that when said lock-bar is lowered to unlocked position asheretofore described, any number of the bridge bars may be removed asdesired.- It is to be further noted with reference to the constructionof these bridge bars that they are formed with a rib or fin'15, whichribs, when the bars are assembled, present practically a corrugated bedor surface to the fuel, and it has been found that such corrugated bedabsolutely prevents any clinker adhering to the several bridge bars. i v

. Inaddition to the .main purpose of the ribs or fins 15, it will beunderstood that these ribs give to the bridge bar a greater depth thanthey would otherwise have, and thus an eflicient h'eatin of the airwhich passes between the bars is provided for. In this connection, it isto be noted that the air from the ash pit is admitted to the bridge barsthrough the air-apertures 16 formed in the supporting shelf 5, and thenpasses between the bars and through the openings the recesses 9 when thebars are bridfge wall to be discharged at a point over the re in thefire box, and readily combine with the fuel gases and products andassure-a complete and perfect combustion of the same.

Each of the bridge bars are further constructed with narrow slots 17which when the several bars are assembled form one con tinuous slot thewhole length of the bridge through this slot, so that a sheet of air isthus forced through the top of the bridge wall.

The structure herein described is one that can be fitted into anyfurnace of the nature mentioned, without requiring the furnace to bealtered in any particular, and owing to the novel manner of forn'iingthe several bridge bars, heated air from below the bars may be conductedbetween and discharged from the same in sucha direction and at a pointto intercept the liberated gases and unconsumed smoke, soot, particlesof coal, etc., to insure perfect and complete combustion before the sameshall have passed from the furnace, as it otherwise would, in anunconsumed state.

The construction and operation of our invention will bereadilyunderstood upon reference to the foregoing description and accompanyingdrawings, and it will be appreciated that the parts and combinationsrecited may be varied within a wide range without departing from thespirit and scope thereof.

\Vhat we claim is l. Abridge wall for furnaces, comprising afixedsupporting member, a plurality of bars carried by said member, and amovable, element for simultaneously locking the bars in position.

A bridge wall for furnaces, comprising a fixed supporting member, aplurality of bars carried by said member, and'an elementmovable relativeto the bars for simultaneously locking all the bars in position.

3. A bridge wall for furnaces, comprising a fixed supporting member, aplurality of bars carried by said member, and a movable elementindependent of the bars for simultaneously locking all the bars inposition.

4. A bridge wall for furnaces, comprising a fixed supporting member, aplurality of detachable bars carried by said member and having airspaces between them, and a movable lock-bar for simultaneously lockingall a plurality of bridge bars, each bar having a rib or fin extendingfrom'the front face of said bar and projecting into the fire-box of thefurnace. said ribs when the bridge bars are assembled forming acorrugated bed or surface for the fuel.

6. A bridge wall for furnaces, comprising a plurality of bridge bars,arranged side by side and formed to provide air openings through thebridge wall, and an anti-clinkering rib or fin formed on each of thebars.

7. A bridge Wall for furnaces, comprising a vertically disposedsupporting plate, a supporting shelf extending at an angle to saidplate, a plurality of bridge bars supported at their upper ends by thesupporting plate and at their lower ends by the supporting shelf, and alock-bar adapted when in locked position to be interposed between thesupporting plate and a portion of the upper ends of all of the bridgebars.

8. A bridge Wall for furnaces, comprising a vertically disposedsupporting plate having a ledge projecting at an angle thereto, aplurality of bridge bars supported by said vertical plate, each of saidbars being provided with a lug or projection adapted to engage theunderside of the projecting ledge when the brid e bars are in lockedposition but capable of clearing the ledge when in unlocked position,and a locking means for all of the bars.

9. A bridge wall for furnaces, comprising a supporting plate having alocking ledge formed thereon, a plurality of bridge bars supported bysaid plate, each of said bars being provided with a lug or projectionadapted to engage beneath the locking ledge when the bars are in lockedposition but capable of clearing the ledge when in unlocked position,and a lock-bar adapted to engage between the supporting plate and aportion of the several bridge bars for bold ing the lugs or projectionsin engagement with the locking ledge and thus preventing the removal ofthe bridge bars.

10. A bridge wall for furnaces, comprising a vertically'disp'osedsupporting plate having a locking ledge formed thereon, a plurality ofbridge bars having hooked ends which straddle the plate for supportingthe bridge bars, each of said bars being provided with a lug orprojection adapted to engage the said locking ledge when the bars are inlocked position but capable of clearing the ledge when in unlockedposition, and a lock-bar adapted to be interposed between the hooked endof all of the bridge bars and the supporting plate for holding the lugsin engagement with the locking ledge.

11. A bridge wall for furnaces, comprising a plurality of bridge barseach of which is provided with a transverse slot so formed that when thebars are assembled a continuous elongated slot is provided in the bridgewall for permitting a sheet of air to be passed through the same.

12. A bridge wall for furnaces, comprising a vertically disposedsupporting plate having a supporting shelf extending at an angle to saidplate and provided with air apertures, a plurality of bridge bars having"air spaces between the same and supported at their upper ends by thesupporting plate and at their lower ends by the supporting shelf, and alock-bar adapted when in locked position to be interposed between thesupporting plate and a portion of the upper ends of all of the bridgebars.

Intestimony whereof I afiix my signature in presence of two witnesses.

GEORGE VVARRINGTON.

Witnesses HENRY E. Coornn, FLORENCE E. POPKINS.

In testimony whereof I aiiix my signature in presence of two witnesses.

LUTHER D. LOVEKIN.

lVitnesses:

MARY I. BRADLEY, JAMES J. BRADY.

